Ulises Jeremias · OSS DevEx

AI-native DevEx & OSS builder. Reproducible workstations, agentic workflows, CLI tools, app scaffolds, and V scientific tooling

[Ulises Jeremias · OSS DevEx @ulisesjcf]

I’m reshaping this account around the OSS/dev tooling work I care about most

I’ll be sharing reproducible workstations, AI-native developer workflows, app scaffolding, DevEx, persistent context for coding agents, and V scientific tooling

Most of it already lives on my GitHub

[Ulises Jeremias · OSS DevEx @ulisesjcf]

🚀 VSL v0.2.0-beta.1 and VTL v0.2.0-beta.1 are out!

🔬 VSL = scientific computing foundation
🧠 VTL = tensors, autograd, and neural networks

One step closer to real-world ML in V

https://t.co/gaRJCxAzWF
https://t.co/6SBdLYtYiC

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@KaiXCreator Exactly.

That’s one of the main reasons I started building my own AI workflow around reproducible workstations, persistent context, repo conventions, skills, and local tooling.

If everyone has access to the same models, the differentiator becomes the system around them.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@CodeWithAmann Arch Linux daily here.

My setup has slowly turned into a full reproducible workstation with chezmoi, Hyprland/Wayland, theme-aware colors, and a lot of automation around my dev workflow.

I keep the dotfiles open here: https://t.co/mCx4BO1AyY

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@ThePrimeagen This is why I care more about the harness around the agent than the agent itself.

Models and apps will keep changing.

But repo context, memory, scripts, conventions, workflows, and guardrails need to be portable instead of locked into one tool.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@theo Yes. I still prefer CLI-first agents.
The terminal keeps the agent close to the repo, scripts, git, logs, tests, and my actual dev environment.
OpenCode and GitHub Copilot CLI have worked really well for me.
Desktop apps feel a bit too far from the loop.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@midudev Es una locura total!

Más allá de si técnicamente termina saliendo bien, este tipo de cambios me dejan pensando bastante en reviewability, ownership y mantenibilidad a largo plazo.

No me preocupa tanto “si compila”, sino cómo se razona y se evoluciona algo así después.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@hugorcd Same feeling.

I’m not against compiler-assisted rewrites or AI-assisted work, but massive diffs like this make me wonder how we’re supposed to reason about ownership, reviewability, and long-term maintainability.

The code may work today, but the process is what worries me.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@ThePrimeagen I feel this.

The more I use agents, the more I think the real work is not “make it code for me”, but “make the context, constraints, and feedback loop explicit enough that it can work with me”.

[Haider. @haider1]

i never thought i'd say this, but coding got boring

you write a prompt, wait 10-50 minutes, review the code, ask for fixes, then repeat

that's it. that's the job now

no more debugging for hours. no more stack overflow rabbit holes

just… prompting. reviewing. prompting again

[Filip Ganyicz @ganyicz]

So, have we all decided to just accept this?

[The V Programming Language @v_language]

VSL v0.1.51 released!

Major milestone: VSL now has 100% pure V BLAS and LAPACK implementations as the default!

- Zero deps (no C libs needed)
- High perf (competitive with C backends)
- Cross-platform
- Production ready
- Benchmarks and enhanced docs

https://t.co/90jPDKLubk

[Ulises Jeremias · OSS DevEx @ulisesjcf]

Seems I'm a "Exemplary AI/ML Developer" 😄
https://t.co/FzPc4Q5N5s #GitRoll

[Konstantin Kirilin @cons_kirilin]

@tsoding “Users don’t care about performance”
Gamedevs crying bloody tears rn
We, web devs, just have it extremely easy

[Тsфdiиg @tsoding]

"Users don't care about performance"

They do. They just rarely have a choice. Give them to choose between a slow and a fast app and you will be blown away by the results. The problem is that all apps these days are a slow, buggy crap. It's you who don't care. Not them.

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@PlaceboXR Felicitaciones amor! 😍💕🥳 cada vez falta menos ❤️❤️

[Ulises Jeremias · OSS DevEx @ulisesjcf]

Just updated my GitHub profile! Check it out, maybe you'll find something useful in there! 👋🔭 Will try to keep it up to date every month 😁

https://t.co/oESGRbRgPk

[Ulises Jeremias · OSS DevEx @ulisesjcf]

@ulisesjeremias has completed Hacktoberfest! https://t.co/gOnzhZpOtH via @holopin_

[Alvar Lagerlöf @alvarlagerlof]

Tried bun install at work today on our fairly large monorepo. Both already had caches + lockfiles.

yarn v3 - 2 minutes 7 seconds
bun - 4 seconds

🤯

[The V Programming Language @v_language]

V 0.4 is out!

2160 commits pushed to master, 1205 bugs closed since V 0.3.

4 165 files changed, 329 174 insertions(+), 42 434 deletions(-).

V 0.4 changelog is combined from 0.3.1-0.3.5 releases.

The changelog is huge! It has 370 items:

https://t.co/wxCnmW7ymB